Marine propulsion means



Jan..15, 1929.

c M PAXTON MARINE PROPULSION mums 2 Sheets-Sheet 1 ENTOR flyj wvz Pag ia,

Filed April 6, 1927 Jan. 15, 1929.

C. M. PAXTON MARINE PROPULSION MEANS 2 Sheets-Sheet 2 M ATTORNEY Patented Jan. 15, 1929.

UNITED sures PATENT OFFICE.

OI AMERICA.

cnnrroan m. rax'ron', rumour, NEW YORK, assrenoa 'ro rax'ron oonrom'rrou MARINE PROPULSION MEANS.

Application filed April 6,

My present invention relates to propulsion of boats by water jets, particularly those used in accordance with the principles set forth in my prior Patent No. 1,543,026, granted "June 30, 1925. According to this method,

the propulsion is by means of sheet ets from nozzles located on the entrance section of the boat in advance of and discharging through a region adjacent the under-water body of the ship, beneath where the maximum bow wave tends to pile up, when the ship is proceeding at speed. An important feature is fitting the jets to the hull of the ship, in accordance with the available pump pressure of the power plant and the predetermined operating speed. Important factors of the fitting of the jet are proper deslgn of surface area of the jet relatively to the cross-section, in combination with proper outward angle of projection of the jet from the hull of the Suitable means for varying cross-section without substantial change of surface area of the jet may be afforded by a special construction of nozzle set forth in my application, Serial No. 176.600. My presentinvention may include all of the features of said prior application, togetherwith practical means for adjusting the outward angle of the jet from within the ship while underway. The latter feature is of importance regardless of whether or not the thickness of the jet is adjustable in accordance with said application.

The above and other features of my invention will be more evident from the following description in connection with the accompanying drawings, in'which Fig. 1 is a sectional view transversely of the jet nozzle;

Fig. 2 is a side elevation;

Fig. 3 is a detailed view of the nozzle element; and

Fig. 4 a top plan view of the complete device.

In Fig. 1, the plate 1 is supposed to be the bow plating of the hull of the ship, full showing of which is not essential to an understanding of my present invention. The water for theets is supplied through a header 2, which is formed with a flange 3 fitting against the face of the hull plate 1, which has an opening 4 cut therethrough correponding to the interior conduit portion of the header. The corresponding exterior conduit member, 5, forming a continuation of 1927. Serial- No. 181,291.

the passage 2, is also provided with a flan e 6 fitting against the exterior of the hull. T e flanges are rigidly secured to each other and to the hull plate as by rivets 7, 7, and the rearwardly directed portion of the header formed with passages transverse to its axis,

which are shaped as jet nozzles, the horizontal section being clearly shown in Fig. 1 and the outlet orifice in Fig. 3.

As shown in Fig. 2, the outboard casting 5 is formed with a removable head 11, of proper size to cover the large end of the nozzle cone, the far end of the cone being retained by an integral head 12. Preferably, the nozz e member is provided with a shaft 13 projecting from its small end. This projects through the head member 12 and is secured by lock nuts 14, 14, which may be secured by pin 15, indicated in Fig. 3.

The largerend of the nozzle cone also has an axial shaft member 16, projecting through the head 11 and having thereon a worm wheel 17 non-rotatably secured as by key 18. The worm wheel is rotated to rotate the plug to required position of adjustment by worm 18 on a shaft 19 secured in suitable bearing 20 on the casting 11 and extending through the plate 1 to the interior of the vessel and formed at the end 19* for engagement by handwheel, wrench or other device suitable for rotating it to adjust the angle of the nozzle member 9. Suitable bearing and packmg means may be provided in the form of members 20 and 22, the latter being provided within the ship with a packing gland 23, closed by cup 24.

While it is evident that the jet cross-section shown in Fig. 1 could extend the entire length of the rotary nozzle element in a single sheet, I prefer to divide the space lengthwise into three nozzles, 25, 26, 27 separated by shortTlengths of metal integral with the p ug.

While it is not essential to the adjustability feature of my present invention, the effective widths of the jet orifices may be made adustable after the manner set forth in my prior application, that is, by having interior plates or liners 28 that are capable of adjustment inward and outward by set screws 29,

I means therefor, including a conduit for supprovided with lock nuts 30. To permit such movement, the liners 28 are preferably of spring bronze shaped to fit the curvature of the interior surfaces of the nozzle and having their nozzle ends free and their remote portions anchored to the plug, preferably rigidly as by screws 31, 31. Preferably, the spring set of these liners is such as to cause them to normally lie flat against the nozzle surface and they are further forced against such surfaces by the jet pressure when in operation. To eflect desired narrowing of the slot outlet of the nozzle,to reduce the crosssection of the jet without substantial reduction of its surface area, or for the pur ose of increasing velocity by varying the bac' pressure or throttle efiect of the nozzle, the set screws are simply screwed inward a desired distance. Preferably, the arrangement is such that the rotary adjustment by means of worm 18 will be sufficient to bring the screws 30 clear of the housing passa e.

lBy my above invention I have provided means whereby the jets may be fitted to the hull of the vessel to suit varying conditions or contingencies such as partial failure of pumps or motive power or varying speed of ship due to varying full-load and no-load conditions and for low speed operation under special conditions of traflic or storm.

I claim:

1. A marine vessel and water et propelling means therefor including a conduit for suppl of water under pressure and an exterior submerged nozle member therefor in the form of a circular elongated member rotatably mounted and having its axis extending downward along the hull and having an outlet assage extending transversely of said axis, t e outlet end thereof being a slot-like orifice extending lengthwise of said axis, in

combination with means controlled from within the ship for rotating it.

2. A'marine vessel and water jet propelling means therefor, including a conduit for suppl of water under pressure and an exterior submerged nozzle member therefor in the form of a circular member rotatably mounted, means controlled from within the ship for rotating it, and means for varying the area of the nozzleoutlet.

3. A marine vessel and water et propelling ply of water under and exterior su merged nozzle member therefor in the form of an elon ted member mounted for rotation' on an axis extending downwardalohg the hull and having outlet passages extending transversely to said axis each having a slotlike orifice extending lengthwise of said axis,

in combination with means extending withinthe ship for rotating said nozzle member about said axis.

4. A marine vessel and water jet propelling means therefor, including a conduit for supply of water under pressure and an exterior su merged nozzle member therefor in the form of an elongated member mounted for retation on an axis extending downward'along the hull and having outlet passages extending transversely to said axis, in combination with means extending within the ship for rotating said nozzle member about said axis, and

pieans for varying the area of the nozzle out- 5. A marine Vessel and water jet propelling means therefor, including a conduit for supply of water under pressure and an exterior su merged nozzle member therefor, in the form of a rotatably mounted truncated cone having its axial length much greater than its diameter and formed with transverse conduit assages having elongated orifices.

6. marine vessel and Water jet propelling means therefor, including a conduit for supply of water under pressure and an exterior su merged nozzle member therefor, in the form of a rotatablyimounted truncated cone having its axial length much greater than its diameter and formed with transverse conduit passages having elongated orifices parallel with said axis.

7. A marine vessel-and water jet propelling means therefor, including a conduit for supply of water under pressure and an exterior submerged nozzle member therefor, in the form of a rotatably mounted truncated cone having its axial length much greater than its diameter and formed with transverse conduit passages having elongated orifices parallel with said axis, and means for varying the area of the nozzle outlet. n.

Signed at New York inthe county of New York, and State of New York, this fifth day of April, A. D. 1927.

CLIFFORD M. PALXTON. 

